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SOUNDFIELD REPRODUCTION USING THEORETICAL CONTINUOUS LOUDSPEAKER Yan Jennifer WU & Thushara D. Abhayapala
 

Summary: SOUNDFIELD REPRODUCTION USING THEORETICAL CONTINUOUS LOUDSPEAKER
Yan Jennifer WU & Thushara D. Abhayapala
Dept of Information Engineering, Research School of Information Sciences & Engineering
Australian National University
Email: jennifer.wu@rsise.anu.edu.au, thushara.abhayapala@anu.edu.au
ABSTRACT
Reproduction of a soundfield is a fundamental problem in
acoustic signal processing. A common approach is to use
an array of loudspeakers to reproduce the desired field where
the least square method is used to calculate the loudspeaker
weights. However, the least square method involves matrix
inversion which may lead to errors if the matrix is poorly con-
ditioned. In this paper, we derive a new theoretical continu-
ous loudspeaker method to obtain the loudspeaker aperture
function in order to avoid matrix inversion. In addition, the
aperture function obtained through continuous loudspeaker
method reveals the underlying structure of the solution as a
function of the desired soundfield, the loudspeaker positions
and the frequency. Results are verified through simulations.
Index Terms-- acoustic field, least square method, ma-

  

Source: Abhayapala, Thushara D. - Department of Information Engineering, Australian National University

 

Collections: Computer Technologies and Information Sciences